/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendRegistries.h
Unregister an external node from the frontend.
True on success, false on failure.
bool UnregisterNode ( const [FNodeRegistryKey](API\Plugins\MetasoundFrontend\FMetasoundFrontendRegistryContai-\FNodeRegistryKey) & InKey )